setteB.IT writes: "On December 1st, as announced three months ago, NBC Universal TV channels (Bravo, mun2, NBC, NBC News & CNBC, NBC Sports, Sci Fi, Sleuth, Telemundo and USA) disappeared from the networks available on US iTunes Store's TV shows.
As noted before from setteB.IT some shows broadcasted in US from these channels are still available on US iTunes Store because they are produced from other Hollywood studios, like 20th Century Fox, ABC/Disney, Viacom...
NBC Universal has recently opened NBC Direct and Hulu (with Fox) to distribute the shows over the web.
Here is the article on setteB.IT in Italian and here the automatic translation from Google."